A prozbul is written only for [a debt backed by] land. If he has none, he may award him a small amount within his own field. [If] he had a field in the town held as a security [for another debt], we may [still] write a prozbul based on it. R’ Chutzpis says: One may write [a prozbul] for a man based on the property of his wife, and for orphans based on the property of [their] guardians.